Test internal ADC

Core/Inc/stm32f0xx_it.h

@@ -52,6 +52,7 @@ void SVC_Handler(void);
 void PendSV_Handler(void);
 void SysTick_Handler(void);
 void TIM14_IRQHandler(void);
+void TIM16_IRQHandler(void);
 /* USER CODE BEGIN EFP */
 
 /* USER CODE END EFP */